! Swift/XRT hardness ratio of trigger: 1090472, name: GRB 211221A ! T0 for this burst is Swift MET=661812549.12 s, = 2021 Dec 21 at 20:48:40.822 UT ! The hard band is 1.51-10 keV ! The soft band is 0.3-1.5 keV ! For details of light-curve production, see Evans et al. 2007, A&A, 469, 379 ! There are 3 datasets: Hard, Soft, and the ratio ! Columns are as labelled ! BINMODE: GRB-like (counts) READ TERR 1 READ SERR 2 NO NO NO NO NO ! PC -- hard data !Time Err (pos) Err(neg) Rate Error 189.698 72.332 -75.600 2.975215 0.355633 613.236 393.461 -351.205 1.006985 0.092147 36401.135 31847.383 -15027.032 0.007666 0.001467 NO NO NO NO NO ! PC -- soft data !Time Err (pos) Err(neg) Rate Error 189.698 72.332 -75.600 0.872022 0.193932 613.236 393.461 -351.205 0.316467 0.052028 36401.135 31847.383 -15027.032 0.004021 0.001090 NO NO NO NO NO ! PC -- hardness ratio data !Time Err (pos) Err(neg) Rate Error 189.698 72.332 -75.600 3.411858 0.861431 613.236 393.461 -351.205 3.181955 0.598695 36401.135 31847.383 -15027.032 1.906208 0.632398